PC817 DIP-4 Transistor Output Optocoupler (Pack of 5 ICs)
$ 0.06
The PC817 DIP-4 Transistor Output Optocoupler is a 1-channel 4-pin Transistor Output Photocoupler contains an IRED optically coupled to a phototransistor. It is suitable for programmable controllers and facsimiles. Features 10 to 20mA Collector current. 50mA Forward current. 6V Reverse voltage. 200mW Total power dissipation. Applications: Communications & Networking, Industrial.

Colorful Round Tactile Button Switch Assortment - 15 pack
BMP388 Barometric Pressure Sensor 24-bit, Altimeter & Thermometer, I2C/SPI Interface, 3.3V/5V
1K ohm, 1/4 Watt Resistor (Pack of 10)